Voyager 1 is now 21 light hours from the Sun. In less than 6 years, it will be our first spacecraft to venture more than a light day away. Here is a pannable simulation of our solar system's hyperbolic spacecraft. orbitsimulator.com/gravitySimulat…

12 Aprile 2025. Comet C/2025 F2 (SWAN) this morning from Sormano2 (L06), a tail of about 1 degree is visible (G. Ventre). mv ~ 8.5

C/2025 F2 Swan under fullmoon conditions 2025 april 13 2.45 UT 10min 14"/4.2 QHY600 Jäger, Rhemann, Prosperi

A visual look at two possible orbits for Planet Nine—one based on Mike Brown does not X & @kb4batygin’s model, the other inspired by a recent IRAS/AKARI paper (arXiv:2504.17288) by Takao Nakagawa, Amos Chen, Tetsuya Hashimoto, Simon Ho, and Seong-Jin Kim.

New comet C/2025 J1 (Borisov) mv ~ 20, announced today on MPEC 2025-K05. Image from (L06) Sormano2, taken on 14 May 2025, UT 21:29:36 by G. Ventre.

If Planet 9 exists at ~600 AU, its motion against the sky is primarily parallax caused by Earth's motion. The slow crawl towards the left of the screen is from Planet 9's orbital motion. Each loop is 1 year. The grid marks are spaced 1 degree apart.

Beautiful rendez vous of comet C/2023 T3 (Fuls) and a galaxy PGC 45405. Comet C/2023 T3 (Fuls) 2025 May 17.38 UT m1=15.3 (m2=16.6) Dia.=0.7' Tail=3.4' in PA 274 deg...[T17] 0.43-m f/6.8 Corrected Dall-Kirkham + CMOS... T. Prystavski... (iTelescope observatory, Q62 (remotely

Comet C/2023 A3 Tsuchinshan-ATLAS on 19 May 2025, from (L06) Osservatorio Astronomico Sormano2 (G. Ventre

Faint comet. It will pass perihelion on Jul. 13.0, 2025 and then start fading slowly after this. Comet C/2023 V1 (Lemmon) 2025 May 08.46 UT m1=17.6 (m2=18.5) Dia.=0.3'... [T26] 0.51-m f/3.0 Cassegrain + CMOS... T. Prystavski... iTelescope observatory, U94 (remotely from Great

New comet C/2025 K1 (ATLAS) discovered, potentially visible with binoculars in October 2025. Complete info: theskylive.com/c2025k1-info #C2025K1 #comet #astronomy

C/2025 K1 (ATLAS) 2025/05/25.384 UT #Cometobs

C/2025 K1 (ATLAS) 2025/05/27.410 UT, mag=17.8, Dia.=15", appears to have a faint tail in p.a. 260 deg. #Cometobs

Brand new comet! With low perihelion distance (q=0.335 AU) and two close approaches to Earth - on Aug. 12 (0.58 AU) and on Nov. 24 (0.40 AU). Comet will pass perihelion on Oct. 8, 2025. Comet C/2025 K1 (ATLAS) 2025 May 28.40 UT m1=17.7 (m2=18.0) Tail=0.6' in PA 251 deg... [T26]

Newly-discovered #comet C/2025 K1 (Atlas) will be a northern hemisphere gem for much of the rest of the year, making 2 close approaches to Earth: 0.58 AU in August, and 0.40 AU in November.

The three solar active regions AR 4099, AR 4100, AR 4101 visible on the Sun today. Instrument: Maksutov 102/1300, ZWO ASI 585 MC camera, Fujifilm XF 2x Teleconverter used as a 2x Barlow lens. Processing: AstroSurface 5 & Phososohp.

New comet C/2025 K3 (PANSTARRS) discovered on May 23. Parabolic and highly inclined (105°) orbit with distant perihelion (3.46 AU). Perihelion transit on Dec 13, 2028. Predicted as bright as mag 14-15 from Nov 2028 to May 2029. theskylive.com/c2025k3-info

New long period comet C/2025 L1 (ATLAS). Highly inclined (114°) parabolic orbit, perihelion at 1.68 AU on Jan 12 2026. Estimated peak magnitude ~13 in mid-March 2026. theskylive.com/c2025l1-info